163128757 has 8 divisors (see below), whose sum is σ = 178241472. Its totient is φ = 148063200.

The previous prime is 163128743. The next prime is 163128767. The reversal of 163128757 is 757821361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163128757 - 2¹⁹ = 162604469 is a prime.

It is a super-2 number, since 2×163128757² = 53221982720730098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163128767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4344 + ... + 18577.

It is an arithmetic number, because the mean of its divisors is an integer number (22280184).

Almost surely, 2^163128757 is an apocalyptic number.

It is an amenable number.

163128757 is a deficient number, since it is larger than the sum of its proper divisors (15112715).

163128757 is a wasteful number, since it uses less digits than its factorization.

163128757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23579.

The product of its digits is 70560, while the sum is 40.

The square root of 163128757 is about 12772.1868526889. The cubic root of 163128757 is about 546.3993520472.

The spelling of 163128757 in words is "one hundred sixty-three million, one hundred twenty-eight thousand, seven hundred fifty-seven".